Brinell hardness tester is a precision measuring instrument for measuring metal Brinell hardness

Brinell hardness tester is mainly used to measure the hardness of cast iron, steel, non-ferrous metals and soft alloys. Brinell hardness test is a test method of indentation in all hardness tests. It can reflect the comprehensive properties of materials and is not affected by microsegregation and uneven composition of samples. Therefore, it is a high precision hardness test method. Brinell hardness tester can be used to test castings, forgings, steel in supply, non-ferrous metals and semi-finished steel parts after quenching and tempering heat treatment. After metal spraying, it is a portable instrument that can be used in the workshop. It is simple to operate and easy to carry. It can test large workpieces on site without sampling. It can realize the piece by piece detection of large workpieces.

Brinell hardness tester is mainly used to test the hardness of forged steel and cast iron with uneven structure. The Brinell hardness of forged steel and gray cast iron has a good corresponding relationship with tensile test. Brinell hardness test can also be used for nonferrous metals and mild steel. Small diameter ball indenter can be used to measure small size and thinner materials. Brinell hardness tester is mostly used for the detection of raw materials and semi-finished products. Because of the large indentation, it is generally not used for the detection of finished products.

The choice of test conditions for Brinell hardness test is the same as the choice of scale for Rockwell hardness test. The choice of test conditions for Brinell hardness test is the choice of test force F and indenter ball diameter D. This choice is not arbitrary, but to follow certain rules, and pay attention to the reasonable match of the test force and the diameter of the indenter ball, the application is slightly more complex than the Rockwell hardness test.

The working principle of Brinell hardness tester is to press a steel ball with a certain diameter into the surface of the sample at a certain speed under the action of a certain test force, and remove the test force after the specified test force holding time. The Brinell hardness of the metal is expressed by the average pressure on the spherical surface area of the indentation

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